The mechanism of propene loss from protonated phenyl n-propyl ether and a series of mono-, di-, and trimethylphenyl n-propyl ethers has been examined by chemical ionization (CI) mass spectrometry in combination with tandem mass spectrometry experiments. The role of initial proton transfer to the oxygen atom and the aromatic ring, respectively, has been probed with the use of deuterated CI reage...

Highly purified 5-vinyl-1H-tetrazole was synthesized, which is in great demand modern medicine and industry as a monomer for obtaining nitrogen-rich macromolecular compounds reagent the complete synthesis of biological compounds. The molecular structure studied experimentally with sequential X-ray diffraction analysis theoretically ab initio quantum chemical calculations. data from differential...

Nitrate is a key component of synthetic fertilizers that can be beneficial to crop production in agro-ecosystems, but can also cause damage to natural ecosystems if it is exported in large amounts. Stable isotopes, both oxygen and nitrogen, have been used to trace the sources and fate of nitrate in various ecosystems. However, the oxygen isotope composition of synthetic and organic nitrates is ...

I N THE METHOD for the determination of blood urea imitrogeit described by us in Clinical Chemistry, 5, 617 (1959) a suli uric arsenic pentoxide solution is used for the reaction between diacetvl nionoxime and urea. Since the article was published tile manufacturer of time systeln* has recommended tile use of a ferric-alum-acid reagent developed by P. Paubiollsky and based on proposals by F. Mc...

Transition metal reagents and catalysts are generally effective to cleave all three bonds (one σ and two π) in a triple bond despite its high bonding energy. Recently, chemistry of single-bond cleavage by using main-group element compounds is rapidly being developed in the absence of transition metals. However, the cleavage of a triple bond using non-transition-metal compounds is less explored....

Abstract [1,2]‐shift of atoms in alkyl fragments belongs to the class dyotropic rearrangements. Various atoms, including halogens can be involved migration, however participation iodine is unprecedented. Herein, we report our experimental and DFT studies on oxidation triggered rearrangement iodo chloro functions via butterfly‐type transition state demonstrate migrating ability λ 3 ‐iodane centr...

Phosphoryl transfer from the high-energy phosphate donor ATP is ubiquitous in biological chemistry, and nitrogen nucleophiles, especially histidine, often serve as in vivo acceptors of the γ-phosphate of ATP. Nevertheless, nonenzymatic reactions of ATP with amines have not previously been characterized. We have therefore examined phosphoryl transfer from ATP to amines to provide a basis for und...